公开(公告)号：US5964963A

公开(公告)日：1999-10-12

申请号：US465266

申请日：1995-06-05

Applicant: Manuel C. Turchan ,  Pravin Mistry ,  Shengzhong Liu

Inventor： Manuel C. Turchan ,  Pravin Mistry ,  Shengzhong Liu

IPC: B01J37/34 ,  B22F1/00 ,  B23K23/00 ,  B23K26/14 ,  B23K35/02 ,  B23K35/24 ,  B23K35/26

CPC classification number: B82Y30/00 ,  B01J37/349 ,  B22F1/0018 ,  B23K23/00 ,  B23K26/144 ,  B23K35/0222 ,  B23K35/025 ,  B23K35/24 ,  B23K35/26 ,  B23K35/262 ,  B23K35/28 ,  B23K35/282 ,  B23K35/284 ,  B23K35/30 ,  B23K35/3006 ,  B23K35/3013 ,  B23K2201/001 ,  B23K2203/04 ,  B23K35/0244 ,  Y10S977/777

Abstract: Thermal stresses normally associated with brazing are alleviated by a low temperature brazing technique of the present invention. A low-temperature brazing paste, preferably suitable to be melted at temperatures of no greater than 200.degree. C. (e.g., 100-200.degree. C.), containing nanoscale (.ltoreq.100 nanometer) size particles of gold, cadmium, copper, zinc, tin, lead, silver, silicon, chromium, cobalt, antimony, bismuth, aluminum, iron, magnesium, nitrogen, carbon, boron, and alloys and composites of these materials, is applied as a bead or as a powder spray at the junction of two components desired to be joined together. Energy from a source such as a laser beam (for example a CO.sub.2 laser, an Nd-Yag laser or an excimer laser), flame, arc, plasma, or the like, is "walked" along the brazing material. The energy beam is sufficient to cause melting and re-crystallization of the nanoscale-particle-containing brazing paste. In an exemplary application of the process, blades (vanes) are brazed to the housing and/or to the shroud of an automatic transmission impeller assembly, preferably using the low-temperature brazing paste containing nanoscale (.ltoreq.100 nanometer) size particles of gold, cadmium, copper and/or zinc, or other suitable nanoscale brazing materials.

Abstract translation: 通过本发明的低温钎焊技术可以缓解通常与钎焊相关的热应力。 低温钎焊膏，优选适于在不超过200℃（例如，100-200℃）的温度下熔化，其含有纳米级（

公开(公告)号：US5900225A

公开(公告)日：1999-05-04

申请号：US648355

申请日：1996-05-14

Applicant: Pravin Mistry ,  Shengzhong Liu

Inventor： Pravin Mistry ,  Shengzhong Liu

IPC: C01B31/06 ,  C30B1/00 ,  C30B1/02 ,  C30B29/04 ,  C30B29/02

CPC classification number: C01B31/06 ,  C30B1/00 ,  C30B29/04

Abstract: Diamond materials are formed by sandwiching a carbon-containing material in a gap between two electrodes. A high-amperage electric current is applied between the two electrode plates so as cause rapid-heating of the carbon-containing material. The current is sufficient to cause heating of the carbon-containing material at a rate of at least approximately 5,000.degree. C./sec, and need only be applied for a fraction of a second to elevate the temperature of the carbon-containing material at least approximately 1000.degree. C. Upon terminating the current, the carbon-containing material is subjected to rapid-quenching (cooling). This may take the form of placing one or more of the electrodes in contact with a heat sink, such as a large steel table. The carbon-containing material may be rapidly-heated and rapidly-quenched (RHRQ) repeatedly (e.g., in cycles), until a diamond material is fabricated from the carbon-containing material. The process is advantageously performed in an environment of a "shielding" (inert or non-oxidizing) gas, such as Argon (Ar), Helium (He), or Nitrogen (N.sub.2). In an embodiment of the invention, the carbon-containing material is polystyrene (e.g., a film) or glassy carbon (e.g., film or powder). In another embodiment of the invention, the carbon-containing material is a polymer, fullerene, amorphous carbon, graphite, or the like. In another embodiment of the invention, one of the electrodes is substrate upon which it is desired to form a diamond coating, and the substrate itself is used as one of the two electrodes. This would be useful for forming a thin-film diamond coating on a cutting tool insert.

Abstract translation: 通过将含碳材料夹在两个电极之间的间隙中形成金刚石材料。 在两个电极板之间施加高电流电流，以使含碳材料快速加热。 该电流足以使至少约5,000℃/秒的速率加热含碳材料，并且仅需要施加一小时，以至少将含碳材料的温度升高至少 约1000℃。在终止电流时，对含碳材料进行快速淬火（冷却）。 这可以采取将一个或多个电极放置在与散热器（例如大型钢台）接触的形式。 可以重复地（例如，循环）将含碳材料快速加热并快速骤冷（RHRQ），直到由含碳材料制造金刚石材料。 该方法有利地在诸如氩（Ar），氦（He）或氮（N 2）的“屏蔽”（惰性或非氧化性）气体的环境中进行。 在本发明的一个实施方案中，含碳材料是聚苯乙烯（例如薄膜）或玻璃碳（例如薄膜或粉末）。 在本发明的另一个实施方案中，含碳材料是聚合物，富勒烯，无定形碳，石墨等。 在本发明的另一个实施例中，电极之一是需要形成金刚石涂层的衬底，并且衬底本身被用作两个电极之一。 这对于在切削工具刀片上形成薄膜金刚石涂层是有用的。

公开(公告)号：US06370165B1

公开(公告)日：2002-04-09

申请号：US09357623

申请日：1999-07-20

Applicant: Andrzej R. Badzian ,  Rustum N. Roy ,  Theresa Badzian ,  William R. Drawl ,  Pravin Mistry ,  Manuel C. Turchan

Inventor： Andrzej R. Badzian ,  Rustum N. Roy ,  Theresa Badzian ,  William R. Drawl ,  Pravin Mistry ,  Manuel C. Turchan

IPC: H01S330

CPC classification number: C23C16/483 ,  C23C16/27

Abstract: A diamond coating formed on a WC—Co substrate prepared through a process including employing a plasma and a variety of interactions from a multiple laser system demonstrates exceptional adhesion and indicates a durable cubic diamond structure. The coating on the WC—Co substrate is typically between 25 and 40 &mgr;m thick and has an average crystal size of between 10 and 20 &mgr;m. Various methods of confirming the cubic diamond structure of the coatings have been employed. The adhesion of the diamond coating to the substrate is very strong. An electron microprobe analysis shows tungsten and cobalt atoms incorporated into the film and a layer depleted in cobalt exists at the diamond-WC—Co interface. Particulates of WC—Co—C alloy are spread over the top surface, apparently formed by condensation from the vapor phase of metal-containing molecules. Carbon is confirmed as being the main component of the surface layer.

Abstract translation: 通过包括采用等离子体和多种激光系统的相互作用的方法制备的在WC-Co基底上形成的金刚石涂层显示了出色的附着力并且表明了耐久的立方金刚石结构。 WC-Co基底上的涂层通常为25至40μm厚，平均晶体尺寸为10至20μm。 已经采用确认涂层的立方金刚石结构的各种方法。 金刚石涂层对基材的粘附性非常强。 电子探针分析显示结合到膜中的钨和钴原子，在金刚石WC-Co界面存在贫钴层。 WC-Co-C合金的颗粒分散在顶部表面，显然由含金属分子的气相的冷凝形成。 确认碳作为表层的主要成分。

公开(公告)号：US06274206B1

公开(公告)日：2001-08-14

申请号：US08468612

申请日：1995-06-05

Applicant: Manuel C. Turchan ,  Pravin Mistry

Inventor： Manuel C. Turchan ,  Pravin Mistry

IPC: C23C1648

CPC classification number: C23C16/44 ,  C23C14/0605 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C23C16/4418 ,  C23C16/48 ,  C23C26/00 ,  C30B23/02 ,  C30B25/105 ,  C30B25/18 ,  C30B29/04 ,  F16C33/62 ,  F41A21/04 ,  Y10S427/103 ,  Y10S427/104

Abstract: Energy, such as from one or more lasers, is directed at the surface of a substrate to mobilize and vaporize a constituent element (e.g., carbide) within the substrate (e.g., steel). The vaporized constituent element is reacted by the energy to alter its physical structure (e.g., from carbon to diamond) to that of a composite material which is diffused back into the substrate as a composite material. An additional secondary element, which can be the same as or different from the constituent element, may optionally be directed (e.g., sprayed) onto the substrate to augment, enhance and/or modify the formation of the composite material, as well as to supply sufficient or additional material for fabricating one or more coatings on the surface of the substrate. The process can be carried out in an ambient environment (e.g., without a vacuum), and without pre-heating or post-cooling of the substrate. The process is truly heteroepitaxial, and is suitable for treating substrates of complex geometries, and coating all sides of such substrates either evenly or selectively. The process may also be used as an adjunct to conventional CVD-type processes, to eliminate the need for heating the substrate to high temperatures. Articles formed by the disclosed processes are described, including three-dimensional objects.

Abstract translation: 诸如来自一个或多个激光器的能量被引导到衬底的表面以便移动和汽化衬底（例如钢）内的构成元件（例如，碳化物）。 蒸发的构成元素通过能量反应以改变其物理结构（例如，从碳到金刚石）到​​作为复合材料漫反射到基底中的复合材料的物理结构。 另外可以与构成元件相同或不同的次要元件可任选地被引导（例如喷涂）到基底上以增强，增强和/或改变复合材料的形成，以及供应 用于在衬底的表面上制造一个或多个涂层的足够的或附加的材料。 该方法可以在周围环境（例如，没有真空）中进行，并且不需要对基材进行预热或后冷却。 该工艺是真正的异质外延，适用于处理复杂几何形状的基材，并均匀或选择性地涂覆这些基材的所有面。 该方法也可以用作常规CVD型工艺的辅助装置，以消除将衬底加热到​​高温的需要。 描述由所公开的方法形成的物品，包括三维物体。

公开(公告)号：US06200183B1

公开(公告)日：2001-03-13

申请号：US09357622

申请日：1999-07-20

Applicant: Andrzej R. Badzian ,  Rustum N. Roy ,  Theresa Badzian ,  William R. Drawl ,  Pravin Mistry ,  Manuel C. Turchan

Inventor： Andrzej R. Badzian ,  Rustum N. Roy ,  Theresa Badzian ,  William R. Drawl ,  Pravin Mistry ,  Manuel C. Turchan

IPC: H01J902

CPC classification number: C23C16/27 ,  C23C16/277 ,  C23C16/483 ,  H01J2201/30457

Abstract: The preparation and use of diamond as an electron emission material is disclosed. Satisfactory measurements were conducted on diamond coatings deposited on WC-Co alloy by a multiple pulsed laser process. The electron emission was measured in a diode configuration with a diamond surface-anode spacing of 20 and 50 &mgr;m in vacuum at P=10−7 Torr. Current densities of 6 mA/cm were calculated at an applied of voltage of 3000 V (for 20 &mgr;m). Analysis proved that electron field emission provided by a diamond grown by a multiple pulsed laser process proved to satisfactorily meet the specified demands.

Abstract translation: 公开了金刚石作为电子发射材料的制备和使用。 对通过多脉冲激光工艺沉积在WC-Co合金上的金刚石涂层进行了令人满意的测量。 在二极管配置中测量电子发射，金刚石表面 - 阳极间距为20和50微米，真空度为P = 10-7乇。 在施加的电压为3000V（20mum）下计算出6mA / cm 2的电流密度。 分析证明，通过多脉冲激光工艺生长的金刚石提供的电子场发射证明满足了特定的要求。

公开(公告)号：US5635243A

公开(公告)日：1997-06-03

申请号：US464448

申请日：1995-06-05

Applicant: Manuel C. Turchan ,  Pravin Mistry

Inventor： Manuel C. Turchan ,  Pravin Mistry

IPC: B81C99/00 ,  C23C14/06 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C23C16/44 ,  C23C26/00 ,  C30B23/02 ,  C30B25/10 ,  C30B25/18 ,  C08J7/18

CPC classification number: C30B25/18 ,  C23C14/0605 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C23C16/4418 ,  C23C26/00 ,  C30B23/02 ,  C30B25/105 ,  F41A21/04 ,  F16C33/62 ,  Y10S427/103 ,  Y10S427/104

Abstract: Energy, such as from one or more lasers, is directed at the surface of a substrate to mobilize and vaporize a constituent element (e.g., carbide) within the substrate (e.g., steel). The vaporized constituent element is reacted by the energy to alter its physical structure (e.g., from carbon to diamond) to that of a composite material which is diffused back into the substrate as a composite material. An additional secondary element, which can be the same as or different from the constituent element, may optionally be directed (e.g., sprayed) onto the substrate to augment, enhance and/or modify the formation of the composite material, as well as to supply sufficient or additional material for fabricating one or more coatings on the surface of the substrate. The process can be carried out in an ambient environment (e.g., without a vacuum), and without pre-heating or post-cooling of the substrate. Articles formed by the disclosed processes are described, including three-dimensional objects.

Abstract translation: 诸如来自一个或多个激光器的能量被引导到衬底的表面以便移动和汽化衬底（例如钢）内的构成元件（例如，碳化物）。 蒸发的构成元素通过能量反应以改变其物理结构（例如，从碳到金刚石）到​​作为复合材料漫反射到基底中的复合材料的物理结构。 另外可以与构成元件相同或不同的次要元件可任选地被引导（例如喷涂）到基底上以增强，增强和/或改变复合材料的形成，以及供应 用于在衬底的表面上制造一个或多个涂层的足够的或附加的材料。 该方法可以在周围环境（例如，没有真空）中进行，并且不需要对基材进行预热或后冷却。 描述由所公开的方法形成的物品，包括三维物体。

公开(公告)号：US5554415A

公开(公告)日：1996-09-10

申请号：US182978

申请日：1994-01-18

Applicant: Manuel C. Turchan ,  Pravin Mistry

Inventor： Manuel C. Turchan ,  Pravin Mistry

IPC: B81C99/00 ,  C23C14/06 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C23C16/44 ,  C23C26/00 ,  C30B23/02 ,  C30B25/10 ,  C30B25/18 ,  C08J7/18

CPC classification number: C30B25/18 ,  C23C14/0605 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C23C16/4418 ,  C23C26/00 ,  C30B23/02 ,  C30B25/105 ,  F41A21/04 ,  F16C33/62 ,  Y10S427/103 ,  Y10S427/104

Abstract: Energy, such as from one or more lasers, is directed at the surface of a substrate to mobilize and vaporize a constituent element (e.g., carbide) within the substrate (e.g., steel). The vaporized constituent element is reacted by the energy to alter its physical structure (e.g., from carbon to diamond) to that of a composite material which is diffused back into the substrate as a composite material. An additional secondary element, which can be the same as or different from the constituent element, may optionally be directed (e.g., sprayed) onto the substrate to augment, enhance and/or modify the formation of the composite material, as well as to supply sufficient or additional material for fabricating one or more coatings on the surface of the substrate. The process can be carried out in an ambient environment (e.g., without a vacuum), and without pre-heating or post-cooling of the substrate.

Abstract translation: 诸如来自一个或多个激光器的能量被引导到衬底的表面以便移动和汽化衬底（例如钢）内的构成元件（例如，碳化物）。 蒸发的构成元素通过能量反应以改变其物理结构（例如，从碳到金刚石）到​​作为复合材料漫反射到基底中的复合材料的物理结构。 另外可以与构成元件相同或不同的次要元件可任选地被引导（例如喷涂）到基底上以增强，增强和/或改变复合材料的形成，以及供应 用于在衬底的表面上制造一个或多个涂层的足够的或附加的材料。 该方法可以在周围环境（例如，没有真空）中进行，并且不需要对基材进行预热或后冷却。

公开(公告)号：US20140377476A1

公开(公告)日：2014-12-25

申请号：US14138109

申请日：2013-12-22

Applicant: Pravin Mistry

Inventor： Pravin Mistry

IPC: D06M10/02 ,  D06M10/00

CPC classification number: D06M10/025 ,  B23K10/00 ,  B23K26/348 ,  D06M10/005

Abstract: Material treatment is effected in a treatment region by at least two energy sources, such as (i) an atmospheric pressure (AP) plasma and (ii) an ultraviolet (UV) laser directed into the plasma and optionally onto the material being treated. During processing, the material being treated may remain substantially at room temperature. Precursor materials may be dispensed before, and finishing material may be dispensed after treatment. Precursors may be combined in the plasma, allowing for in situ synthesis and dry treatment of the material. Electrodes (e1, e2) for generating the plasma may comprise two spaced-apart rollers which, when rotating, advance the material through a treatment region. Nip rollers adjacent the electrode rollers define a semi-airtight cavity, and may have a metallic outer layer. Loose fibers and fragile membranes may be supported on a carrier membrane, which may be doped. Individual fibers may be processed. Electrostatic deposition may be performed. Topographical changes may be effected. Various laser configurations and parameters are disclosed.

Abstract translation: 材料处理通过至少两种能量源（例如，（i）大气压（AP）等离子体和（ii）引导到等离子体中的紫外线（UV）激光和任选地被引导到待处理的材料上而在处理区域中进行。 在处理过程中，待处理的材料基本上可能保持在室温。 前体材料可以在之前分配，并且整理材料可以在处理后分配。 前体可以组合在等离子体中，允许原位合成和干燥处理材料。 用于产生等离子体的电极（e1，e2）可以包括两个间隔开的辊，当旋转时，辊将材料推进通过处理区域。 邻近电极辊的压辊定义了半气密腔，并且可以具有金属外层。 松散的纤维和脆性膜可以负载在可以掺杂的载体膜上。 可以处理各种纤维。 可以进行静电沉积。 地形变化可能会影响。 公开了各种激光器配置和参数。

公开(公告)号：US5620754A

公开(公告)日：1997-04-15

申请号：US184041

申请日：1994-01-21

Applicant: Manuel C. Turchan ,  Pravin Mistry

Inventor： Manuel C. Turchan ,  Pravin Mistry

IPC: B81C99/00 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C23C16/27 ,  C30B25/10 ,  B05D3/06 ,  C21D1/00

CPC classification number: C23C16/27 ,  C23C14/22 ,  C23C14/28 ,  C23C16/26 ,  C30B25/105

Abstract: Energy, such as from one or more lasers, is directed at the surface of a substrate to mobilize and vaporize a constituent element (e.g., carbide) within the substrate (e.g., steel). The vaporized constituent element is reacted by the energy to alter its physical structure (e.g., from carbon to diamond) to that of a composite material which is diffused back into the substrate as a composite material. An additional secondary element, which can be the same as or different from the constituent element, may optionally be directed (e.g., sprayed) onto the substrate to augment, enhance and/or modify the formation of the composite material, as well as to supply sufficient or additional material for fabricating one or more coatings on the surface of the substrate. The process can be carried out in an ambient environment (e.g., without a vacuum), and without pre-heating or post-cooling of the substrate.

Abstract translation: 诸如来自一个或多个激光器的能量被引导到衬底的表面以便移动和汽化衬底（例如钢）内的构成元件（例如，碳化物）。 蒸发的构成元素通过能量反应以改变其物理结构（例如，从碳到金刚石）到​​作为复合材料漫反射到基底中的复合材料的物理结构。 另外可以与构成元件相同或不同的次要元件可任选地被引导（例如喷涂）到基底上以增强，增强和/或改变复合材料的形成，以及供应 用于在衬底的表面上制造一个或多个涂层的足够的或附加的材料。 该方法可以在周围环境（例如，没有真空）中进行，并且不需要对基材进行预热或后冷却。

公开(公告)号：US5054682A

公开(公告)日：1991-10-08

申请号：US403669

申请日：1989-09-06

Applicant: Pravin Mistry

Inventor： Pravin Mistry

IPC: B23K20/00 ,  B23K20/16 ,  B23K35/00 ,  C04B37/02

CPC classification number: C04B37/026 ,  B23K20/16 ,  B23K35/004 ,  C04B2237/122 ,  C04B2237/123 ,  C04B2237/343 ,  C04B2237/365 ,  C04B2237/368 ,  C04B2237/38 ,  C04B2237/406 ,  C04B2237/708 ,  C04B2237/76 ,  C04B2237/765 ,  C04B2237/84

Abstract: In a method of joining a metal matrix composite (cermet) or ceramic tool material 1 to a metallic holder 2 by diffusion bonding through an intermediate metallic layer, the tool material 1 includes at least one carbide, nitride or boride in the matrix. In one example, the tool material includes titanium carbide and titanium nitride in the metal matrix. The intermediate metallic layer is chosen from a group consisting of nickel, titanium and tungsten. The tool holder metal 2 is a ferrous alloy. The intermediate metallic layer is placed between the tool material and the metallic holder, and heat and pressure are applied for a controlled period to diffusion bond the tool material to the metallic holder. Articles made by the method include a blank holder, a punch, a die and various wear surfaces of a continuous extrusion apparatus.